Malicious PDF — malware analysis report

Static analysis result for SHA-256 1518fbfb1d69e7a0…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 01:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e77de910d6f6c14de1dba2c47d6a36 SHA-1: e019414f1d0ee56b87d5da9c4acb234ad74e1788 SHA-256: 1518fbfb1d69e7a0b38e9df01a9f409b885bdcff9c73fce217b589ac5dec6e61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/wix?keyword=piano+synthesizer+software+free, which is flagged as a known malicious redirector. The document's structure suggests an attempt to disguise malicious activity within a link farm, likely to evade detection or for SEO manipulation, ultimately leading users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=piano+synthesizer+software+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/riwifofak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/banurekef.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/62074484707.pdf
    • https://static.usrfiles.com/ugd/c618e9_c50e01b3098a425e8f26cc5eb4d12f7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7331cb75466f4d14ab4eec207a33c1d8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/tigulobezuwegelukaxenew.pdf
    • https://cdn.shopify.com/s/files/1/0448/4559/6834/files/68561962508.pdf
    • https://cdn.shopify.com/s/files/1/0428/1847/0044/files/duzivuseb.pdf
    • https://static.usrfiles.com/ugd/9d66c7_36360d4268a646d9a23113ac7f9564d6.pdf
    • https://static.usrfiles.com/ugd/e2c250_575752b10bbc43e2b4e7ba9c91406557.pdf
    • https://static.usrfiles.com/ugd/6c032c_716019bc7eb5495ea98176f110bb7be4.pdf
    • https://static.usrfiles.com/ugd/9e53d4_0d2a0ded51584d85a2562756f1d0dbdc.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_cdc7027e21bb45008fc23c8d64c1570a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006434.bin
4ec78cc7e801b79286605e524ec9322d7d2aec7c1efc0595ff88a3a5c83c1149
pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 5068 bytes
font_01_sfnt_off0000758c.bin
a85279d2d24aec08e87d8969133c8bc7b108ae8356d185053d6e11acdef9e353
pdf-font-stream PDF embedded font (sfnt) at offset 0x758C 10312 bytes